TV & film · 47 credits

Mark Harmon

American actor

Born 2 September 1951 · United States Age 75

★ Follow Mark Harmon Get an email when they're in something new

Known for

NCIS: Originsas Older Leroy Jethro Gibbs · 2024 NCISas Special Agent Leroy Jethro Gibbs · 2003 Natural Born Killersas Mickey Knox in TV reconstruction · 1994 Fear and Loathing in Las Vegas1998

1. 2025 Freakier Friday as Ryan · Film
2. 2024– NCIS: Origins Airing as Older Leroy Jethro Gibbs
3. 2018 All or Nothing: The Michigan Wolverines
4. 2014–21 NCIS: New Orleans Executive Producer
5. 2011 Certain Prey Film
6. 2009 Weather Girl Film
7. 2004 Chasing Liberty Film
8. 2003– NCIS Airing as Special Agent Leroy Jethro Gibbs
9. 2003 Freaky Friday as Ryan · Film
10. 2001 And Never Let Her Go Film
11. 2000 For All Time Film
12. 1999 I'll Remember April Film
13. 1998 Fear and Loathing in Las Vegas Film
14. 1995 Charlie Grace as Charlie Grace
15. 1995 The Last Supper Film
16. 1995 Magic in the Water Film
17. 1995 Original Sins Film
18. 1994 Natural Born Killers as Mickey Knox in TV reconstruction · Film
19. 1994–00 Chicago Hope as Dr. Jack McNeil
20. 1994 Wyatt Earp as Johnny Behan · Film
21. 1991–93 Reasonable Doubts as Det. Dicky Cobb
22. 1991 Cold Heaven Film
23. 1991 Shadow of a Doubt Film
24. 1991 Long Road Home Film
25. 1990 Till There Was You Film
26. 1989 Worth Winning Film
27. 1989 Sweet Bird of Youth as Chance Wayne · Film
28. 1988 The Presidio Film
29. 1988 Stealing Home Film
30. 1987 Summer School Film
31. 1987 Dear America: Letters Home from Vietnam Film
32. 1986 The Deliberate Stranger as Ted Bundy
33. 1986 Let's Get Harry Film
34. 1986 The Deliberate Stranger Film
35. 1986 Prince of Bel Air Film
36. 1984 Tuareg – The Desert Warrior Film
37. 1982–88 St. Elsewhere as Dr. Robert Caldwell
38. 1981–82 Flamingo Road as Fielding Carlyle
39. 1981 Goliath Awaits as Peter Cabot
40. 1981 Goliath Awaits Film
41. 1980 The Dream Merchants as Johnny Edge
42. 1979–81 240-Robert as Deputy Dwayne 'Thib' Thibideaux
43. 1979 Beyond the Poseidon Adventure Film
44. 1978 Comes a Horseman Film
45. 1978 Sam as Officer Mike Breen
46. 1978 Little Mo Film
47. 1978 Getting Married Film

Guest spots

• NCIS: Origins · S1 E1, S1 E2, S1 E4, S1 E6, S1 E7, S1 E9, S1 E10, S1 E11, S1 E12, S1 E14, S1 E15, S2 E6 as Older Leroy Jethro Gibbs

Photo: TVmaze. Credits from TVmaze and Wikidata.